I have been on an insulin pump for about 3 months and my readings have never been so bad as now. I am 76 and I developed diabetes type 1 eleven years ago.  Previously I was on the Novorapid and Lantus injection pens but my Hba1c was never very good (59mmol). I went on the Omnipod dash hoping to lower my Hba1c (the opposite has happened) and to decrease the injection sites as I was developing several lipos on my abdomen.
I don’t understand what I am doing wrong, I test very frequently both with the Freestyle Libre and the Accucheck, I count my carbs meticulously and I follow the advice of my diabetic nurse.  However my blood glucose seems to behave normally for a couple of days or so then suddenly out of the blue shoots up to readings of 20, 28 with no reason and I have to resort to injecting with my pen to get some control. The PDM does not notify me any problems with the pod. However, to make sure, I keep changing the pod but then the whole saga starts again in a few days. 
I feel so disappointed by it all that I am tempted to go back to injecting. I feel so envious of people who are successful on the pump.  Can anybody help?  Is it the wrong pump?  Has anyone else encountered these problems with the Omnipod?
I am feeling depressed.